Four-wheeled motorcycle



FIG. 1 is a top plan view of a four-wheeled motorcycle showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right side elevation view thereof; and,

FIG. 6 is an oblique perspective view illustrating the left side thereof. 

The ornamental design for a four-wheeled motorcycle, as shown. 